iPadOS 11.4 (build 15F79) is an official Apple over-the-air update for the iPad Pro 12.9-inch (Cellular), released on 2018-05-29T17:15:19Z. The update package is 588.8 MB. This is a delta (partial) update that requires 11.2.5 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 2080baf1fa6f11f04974a11e3e6a4758ac2a1018.zip.